R, Kunkulol R R., Lalitha M., Post Graduate, Department of Physiology, Dhanalakshmi Srinivasan Medical college & Hospital, Perambalur, India. Raji , Yinusa, University of Ibadan, Ibadan, Nigeria RR, Kunkulol, Professor, Department of Pharmacology, Rural Medical College, PIMS (DU), Loni, Maharashtra.